Same problem with xorg-edgers repository. After a ppa-purge xorg-edgers, it's now working... There must have been a very recent update that solved the problem. Thanks for your work !
** Attachment added: "Specs.html" https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/1174042/+attachment/3661387/+files/Specs.html -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-ati in Ubuntu. https://bugs.launchpad.net/bugs/1174042 Title: System crashes with open-source radeon driver To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/1174042/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp